Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: How to derive M = L^3 T^-2

  1. Jul 6, 2011 #1
    1. The problem statement, all variables and given/known data

    "Maxwell showed that we can easily do a dimensional analysis on mass, using only Newton’s equations. Mass is [length]^3 [time]^-2 ." (http://milesmathis.com/coul.html)

    I would like to know how to do the dimensional analysis and derive M = L^3 T^-2.

    2. The attempt at a solution

    Since the right side of [itex] F\ = \frac{dp}{dt} [/itex] has M^1, I think I need another equation for force that has M^n on the right side, where n ≠ 1.
  2. jcsd
  3. Jul 6, 2011 #2


    User Avatar
    Homework Helper

    Mass is definitely not [length]^3 [time]^-2. That link is a crackpot website.
  4. Jul 6, 2011 #3
    That may be why the author did not cite the source!
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook